2 * filter_affine.c -- affine filter
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <framework/mlt_filter.h>
22 #include <framework/mlt.h>
31 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
34 mlt_filter filter
= mlt_frame_pop_service( this );
37 mlt_properties properties
= MLT_FILTER_PROPERTIES( filter
);
40 int error
= 0; //mlt_frame_get_image( this, image, format, width, height, 0 );
42 // Only process if we have no error and a valid colour space
43 if ( error
== 0 && *format
== mlt_image_yuv422
)
45 mlt_producer producer
= mlt_properties_get_data( properties
, "producer", NULL
);
46 mlt_transition transition
= mlt_properties_get_data( properties
, "transition", NULL
);
47 mlt_frame a_frame
= NULL
;
49 if ( producer
== NULL
)
51 char *background
= mlt_properties_get( properties
, "background" );
52 mlt_profile profile
= mlt_service_profile( MLT_FILTER_SERVICE( filter
) );
53 producer
= mlt_factory_producer( profile
, "fezzik", background
);
54 mlt_properties_set_data( properties
, "producer", producer
, 0, (mlt_destructor
)mlt_producer_close
, NULL
);
57 if ( transition
== NULL
)
59 mlt_profile profile
= mlt_service_profile( MLT_FILTER_SERVICE( filter
) );
60 transition
= mlt_factory_transition( profile
, "affine", NULL
);
61 mlt_properties_set_data( properties
, "transition", transition
, 0, (mlt_destructor
)mlt_transition_close
, NULL
);
64 if ( producer
!= NULL
&& transition
!= NULL
)
66 char *name
= mlt_properties_get( properties
, "_unique_id" );
67 mlt_position position
= mlt_properties_get_position( MLT_FRAME_PROPERTIES( this ), name
);
68 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( this );
69 double consumer_ar
= mlt_properties_get_double( frame_properties
, "consumer_aspect_ratio" );
70 mlt_properties_set_position( MLT_TRANSITION_PROPERTIES( transition
), "in", mlt_filter_get_in( filter
) );
71 mlt_properties_set_position( MLT_TRANSITION_PROPERTIES( transition
), "out", mlt_filter_get_out( filter
) );
72 mlt_producer_seek( producer
, position
);
73 mlt_frame_set_position( this, position
);
74 mlt_properties_pass( MLT_PRODUCER_PROPERTIES( producer
), properties
, "producer." );
75 mlt_properties_pass( MLT_TRANSITION_PROPERTIES( transition
), properties
, "transition." );
76 mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &a_frame
, 0 );
77 mlt_properties_set( MLT_FRAME_PROPERTIES( a_frame
), "rescale.interp", "nearest" );
78 mlt_properties_set_int( MLT_FRAME_PROPERTIES( a_frame
), "distort", 1 );
80 // Special case - aspect_ratio = 0
81 if ( mlt_properties_get_double( frame_properties
, "aspect_ratio" ) == 0 )
82 mlt_properties_set_double( frame_properties
, "aspect_ratio", consumer_ar
);
83 if ( mlt_properties_get_double( MLT_FRAME_PROPERTIES( a_frame
), "aspect_ratio" ) == 0 )
84 mlt_properties_set_double( MLT_FRAME_PROPERTIES( a_frame
), "aspect_ratio", consumer_ar
);
85 mlt_properties_set_double( MLT_FRAME_PROPERTIES( a_frame
), "consumer_aspect_ratio", consumer_ar
);
87 mlt_transition_process( transition
, a_frame
, this );
88 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, writable
);
89 mlt_properties_set_data( frame_properties
, "affine_frame", a_frame
, 0, (mlt_destructor
)mlt_frame_close
, NULL
);
90 mlt_properties_set_data( frame_properties
, "image", *image
, *width
* *height
* 2, NULL
, NULL
);
91 mlt_properties_set_data( frame_properties
, "alpha", mlt_frame_get_alpha_mask( a_frame
), *width
* *height
, NULL
, NULL
);
98 /** Filter processing.
101 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
103 // Get the properties of the frame
104 mlt_properties properties
= MLT_FRAME_PROPERTIES( frame
);
106 // Get a unique name to store the frame position
107 char *name
= mlt_properties_get( MLT_FILTER_PROPERTIES( this ), "_unique_id" );
109 // Assign the current position to the name
110 mlt_properties_set_position( properties
, name
, mlt_frame_get_position( frame
) - mlt_filter_get_in( this ) );
112 // Push the frame filter
113 mlt_frame_push_service( frame
, this );
114 mlt_frame_push_get_image( frame
, filter_get_image
);
119 /** Constructor for the filter.
122 mlt_filter
filter_affine_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *arg
)
124 mlt_filter
this = mlt_filter_new( );
127 this->process
= filter_process
;
128 mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "background", "colour:black" );